More popular, yes. Usability is subjective. The lack of tiling window management or decent package management on either of the most popular two desktop operating systems renders them unusable to me, so I'm quite thankful that the ecosystem is fragmented enough to cater to my apparently niche tastes.
I would say that the popularity indicates the higher usability. People find Windows and MacOS easier to use, with less random problems. I also don't understand what you mean by lack of package management? Homebrew on MacOS is very decent, on Windows you have Scoop/WinGet which work very well. Either way both are much less fragmented than the Linux flatpak/snap/.deb/AppImage/.tar.gz nightmare which a regular user will never be able to figure out. I swear it's like Linux advocates have never even talked to a normal person, and are somehow under the illusion that Linux is a easy-to-use, user-friendly OS, which .. it's not. Any OS that requires you to know CLI basics to install regular apps is not a user-friendly OS (Chrome gives a .deb, but on some recent distros it cannot be installed by clicking on it! IntelliJ gives .tar.gz, which, well, good luck figuring that out, and others give AppImage, which needs chmod+x!).
